Reflections on the place of criminal law in the European construction

Although the place of EU criminal law in the European construction has become incontestable today, it has historically been a far from obvious one. In its origins and development, two different rationales can be distinguished: a functional one aimed at using criminal law instruments to address specific cross-border crime challenges generated or enhanced by the progress of EU integration in other fields, and a constitutional one implying the use of criminal law also to further enhance the respect and promotion of EU common values. While the first rationale has been dominant from the outset, the second has emerged only gradually. For the sake of effectiveness, legitimacy and mutual trust, both rationales should equally drive the further development of EU criminal law. Yet prospects for a stronger affirmation of the constitutional rationale are weakened by current EU rule of law and democratic leadership challenges.